/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.metron.common.system;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;

public class Clock {
  private final static String UTC = "UTC";

  public long currentTimeMillis() {
    return System.currentTimeMillis();
  }

  /**
   * Retrieves the current time in a given format compatible with {@link SimpleDateFormat}.
   *
   * @param stdDateFormat The format to use
   * @return String representation of the current time
   */
  public String currentTimeFormatted(String stdDateFormat) {
    SimpleDateFormat format = new SimpleDateFormat(stdDateFormat);
    format.setTimeZone(TimeZone.getTimeZone(UTC));
    return format.format(new Date(currentTimeMillis()));
  }

}
